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' o. SANT0R|US,`1. F. GNDNNN AND B. COLONNA. FILM FOR CAMERAS.

APPLICATION FILED JAN.2Z.I916.

nted Aug. 5, 1919.

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NTTED sTATEs PATENT OEEIOE.

@TUN STORIS, JOS F. GN'DARA., AND BENITO COLIN'NA,V 0F EL PASO, TEXAS.

FILM FOR CAMERAS.

initiate.

Specication of Letters Patent.

Patented enig..A 5, 1919.

Application niet .l'anuary 22, 1916.V Serial No. 73,619.

To all Iwhom t may concern:

Be it yknown t at we, @TON SARTORIUS, JOSE JF. GNnARA, and BENITO COLONNA., citizens of the Republic of Mexico, and resi- ,dents of El Paso, inthe county of El Paso and State of Texas, have invented an I mprovement in lEilms for Cameras, of which the following is a specification.

lFhis invention is an improvement in photography and has particular reference to a novel construction of film used therein.

'lhe object is the provision of a iilln of novel construction consisting of sensitized and nonsensitized portions arranged in alternating relation throughout the length of the film to permit of focusing an image between successive exposures whereby a visual image for. each sensitized portion, successively exposed, may be observed before introducing the same into the focal plane, the nonsensitized portion employed being of novel formation.

The inventive idea involved is capable of receiving a variety of mechanical ex ressions, one of which, for the purpose of i lustrating the invention, is shown in the accompanying drawings, in whichligure l is a perspective view of the hlm embodying our invention.

Fig. 2 is a longitudinal section of the film.

lhe film, which comprises the invention, preferably consistsof a protective backing or covering strip 2l and alternating sensitized and nonsensitized portions 22 and 23 respectively, the adjacent ends of said portions 22 and 23 being overlapped and secured together inf.` any preferred manner as shown at 2t in Fig. 2. The portions 22 and 23 form a continuous strip one end of which is secured to the protective covering or backing 21. 'lhis covering is provided with spaced rectangular openings 25 corresponding in number to the number of nonsensitized portions 23 and being of a size substantially equal to the size of the exposure to be made. rllhe covering strip may be provided with the usual suitable indicia visible through the usual rear opening of a camera for the purpose of determining when the nonsensitlzed portions of the ilm are in position for focusing an image andawhen the sensitized portions are in position for exposure. The nonsensitized portions? 23 of the film are preferably made of translucent material, such as tissue paper so that when focusing an image, through g, Vsaid image will be vis'able u on the portlon 23 and the camera may be-t en adjusted to the proper position for making a perfect exposure. lt is to be understood that the film is mounted on the usual feed and take-up rollers so that alternating nonsensitized and sensitized portions may be brought into proper position. After an image has been properly focused the hood of the camera is closed and the film then wound upon the take-up roller until the next succeeding sensitized portion 22 is in proper position as indicated by the indicia visible through the usual opening in the camera used whereupon the exposure may be made as usual.

v'Each of the nonsensitized portions 23 of the film is provided with a plurality of small openings 26 preferably arranged in groups' at each corner of the portion and adapted to prevent the rupture of the same when openingor closing the bellows of the front of the camera.

What is claimed is: l. A camera film comprising a protective backing having spaced si ht openings, alternately, arranged lndependent sensitized and t non-sensitized sections arranged end to end and secured together to form a continuous strip, said strip secured at one end to said protective backing, said non-sensitized sections disposed to register with the aforesaid' sight openings in the backing and the non- Sensitized sections provided with a plurality of rupture preventing openings, for the purpose set forth.

2. A camera film. comprising a. protective backing having a series of spaced sight openings, therethrough, alternating independent sensitized and nonsensitized sections having their adjacent edges overlapped and secured together and to the protective backing at one end, said non-sensitized secltions disposed to register with the aforesaid sight openings and provided with rupture preventing openings for the purpose specitively small openings to prevent rupture by tized portion being provided with a plurality air currents caused by the opening and closof openings, substantially for the purpose ing of the belloyvs of a camera in which the set forth.

s ll lalaieiiamflirllliieciiomprising a protective OTON SARTORIUS' backing having spaced openings and alter- KS F GlD nating sensitized and non-sensitized portions B NITO C O having their adjacent edges secured together Witnesses: to form a continuous strip one end of Which C. W. O. NEWMAN,

1.0 is secured to said backing, said non-sensi- F. E. STEVENSON. 

